Gymnosperms

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Excerpt from Gymnosperms: Structure and EvolutionOf course, all the material for a study of the early gymnosperms is fossil, a record left in stone. By far the greater part of this record consists of impressions, and most of the impressions are those of leaves and stems, with some roots, but there are some impressions of reproductive structures. A leaf would fall into the sand or clay, then the sand or clay would become solid stone, all organic parts would be dissolved, and only the form would remain.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.